Thermoreversible Gelation with Junctions of Variable Multiplicity

1994 ◽  
Vol 27 (14) ◽  
pp. 3943-3954 ◽  
Author(s):  
Fumihiko Tanaka ◽  
Walter H. Stockmayer
Keyword(s):  
Variable Multiplicity ◽  
Thermoreversible Gelation

Thermoreversible gelation with junctions of variable multiplicity

1994 ◽  
Vol 81 (1) ◽  
pp. 171-175 ◽  
Author(s):  
Fumihiko Tanaka ◽  
Walter H. Stockmayer
Keyword(s):  
Variable Multiplicity ◽  
Thermoreversible Gelation

scholarly journals Thermoreversible Gelation with Two-Component Mixed Cross-Link Junctions of Variable Multiplicity in Ternary Polymer Solutions

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 89
Author(s):  
Fumihiko Tanaka
Keyword(s):  
Functional Groups ◽  
Polymer Solutions ◽  
Sol Gel ◽  
Polymer Networks ◽  
Water Soluble ◽  
Cross Link ◽  
Variable Multiplicity ◽  
Multiple Cross ◽  
Thermoreversible Gelation ◽  
Cross Links

Theoretical scheme is developed to study thermoreversible gelation interfering with liquid–liquid phase separation in mixtures of reactive f-functional molecules R{Af} and g-functional ones R{Bg} dissolved in a common solvent. Formed polymer networks are assumed to include multiple cross-link junctions containing arbitrary numbers k1 and k2 of functional groups A and B of each species. Sol-gel transition lines and spinodal lines are drawn on the ternary phase plane for some important models of multiple cross-link junctions with specified microscopic structure. It is shown that, if the cross-link structure satisfies a certain simple condition, there appears a special molar ratio of the two functional groups at which gelation takes place with a lowest concentration of the solute molecules, as has been often observed in the experiments. This optimal gelation concentration depends on f and g (functionality) of the solute molecules and the numbers k1 and k2 (multiplicity) of the functional groups in a cross-link junction. For cross-links which allow variable multiplicity, special attention is paid on the perfectly immiscible cross-links leading to interpenetrating polymer networks, and also on perfectly miscible cross-links leading to reentrant sol-gel-sol transition. Results are compared with recent observations on ion-binding polymer solutions, polymer solutions forming recognizable biomolecular complexes, polymer/surfactant mixtures, hydrogen-bonding polymers, and hydrophobically-modified amphiphilic water-soluble polymers.

Thermoreversible gelation with ion-binding cross-links of variable multiplicity

2019 ◽  
Vol 150 (17) ◽  
pp. 174904
Author(s):  
Fumihiko Tanaka ◽  
Yoshiyuki Nakagawa ◽  
Seiichi Ohta ◽  
Taichi Ito
Keyword(s):  
Ion Binding ◽  
Variable Multiplicity ◽  
Thermoreversible Gelation ◽  
Cross Links

Dynamics during thermoreversible gelation of the polysaccharide schizophyllan

1998 ◽  
Vol 102 (11) ◽  
pp. 1660-1664 ◽  
Author(s):  
Walter Richtering ◽  
Tania Fuchs ◽  
Walther Burchard
Keyword(s):  
Thermoreversible Gelation

Thermoreversible Gelation of Isotropic and Liquid Crystalline Solutions of a “Sticky” Rodlike Polymer

2000 ◽  
Vol 33 (12) ◽  
pp. 4427-4432 ◽  
Author(s):  
Sarah Schmidtke ◽  
Paul Russo ◽  
Javier Nakamatsu ◽  
Ebru Buyuktanir ◽  
Bilge Turfan ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Thermoreversible Gelation ◽  
Rodlike Polymer

On the cooccurrence of demixing and thermoreversible gelation of polymer solutions. 1. Experimental observations

1987 ◽  
Vol 20 (8) ◽  
pp. 1943-1947 ◽  
Author(s):  
L. M. Jelich ◽  
S. P. Nunes ◽  
E. Paul ◽  
B. A. Wolf
Keyword(s):  
Polymer Solutions ◽  
Thermoreversible Gelation
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